latest Assignment VII.3 Building DNA GIZMO.
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1. Look at the DNA molecule shown at right. What does it look like? A twisted ladder This shape is called a double helix. 2. Based on this picture, how do you think a DNA molecule makes a copy of ... itself? (Hint: Look at the bottom two “rungs” of the ladder.) They split in half and reconnect with the correct molecules on the other side. Gizmo Warm-up The Building DNA Gizmo™ allows you to construct a DNA molecule and go through the process of DNA replication. Examine the components that make up a DNA molecule. 1. What are the two DNA components shown in the Gizmo? Nucleosides and phosphates 2. A nucleoside has two parts: a pentagonal sugar (deoxyribose) and a nitrogenous base (in color). When a nucleoside is joined to a phosphate, it is called a nucleotide. How many different nitrogenous bases do you see? 4 Note: The names of these nitrogenous bases are adenine (red), cytosine (yellow), guanine (blue), and thymine (green). [Show More]
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